package cn.interestingshop.servlet;

import cn.interestingshop.entity.User;
import cn.interestingshop.service.UserService;
import cn.interestingshop.service.impl.UserServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.设置编码
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=UTF-8");
        //2.获取请求参数
        String account = request.getParameter("account");
        String password = request.getParameter("password");
        //3.调用service进行业务处理
        UserService service=new UserServiceImpl();
        User user = service.selectOne(account, password);
        //4.分析返回结果
        if(user==null){//登录失败
            //1.保存失败的信息到request
            request.setAttribute("msg","用户名或者密码错误");
            //2.回到登录页面
            request.getRequestDispatcher("Login.jsp").
                    forward(request,response);
        }else{//登录成功
            //1.将用户信息保存到session
            request.getSession().setAttribute("loginUser",user);
            //2.跳转到首页
            request.getRequestDispatcher("Index.jsp").
                    forward(request,response);
        }
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request,response);
    }
}
